Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Reexamination Certificate
2011-03-08
2011-03-08
Young, Wayne R (Department: 2627)
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
C720S681000
Reexamination Certificate
active
07903506
ABSTRACT:
The present invention provides an optical pickup device capable of properly suppressing coma aberration which occurs due to a relative tilt error between objective lenses. The optical pickup device includes: first and second objective lenses having different optical characteristics; a lens holder provided with first and second lens receiving cylindrical parts to which the first and second objective lenses are attached so that distance from the first objective lens to an optical recording medium becomes shorter than distance from the second objective lens to the optical recording medium without overlapping the objective lenses; and a buffer member formed in a cylindrical shape so as to surround the periphery of the first objective lens, and having a projection for preventing collision between the first objective lens and the optical recording medium, the projection being provided at an end on the optical recording medium side. In the optical pickup device, the second objective lens is fixed in the lens receiving cylindrical part, and a lens tilt adjusting and holding structure for holding the first objective lens so that tilt of the first objective lens can be adjusted is added to the buffer member and the first lens receiving cylindrical part.
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Hatano Shinya
Hosoda Ryozo
Sasaoka Hiromasa
Takahashi Kazuhiro
Funai Electric Co. Ltd.
Osha • Liang LLP
Yodichkas Aneeta
Young Wayne R
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